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Molecular dynamics simulations of effective interactions among clinker minerals in aqueous solution and the structure and dynamics of the interstitial water
Materials and Structures ( IF 3.8 ) Pub Date : 2021-06-07 , DOI: 10.1617/s11527-021-01731-9
Juan Pablo Gallo-Molina , Adilson Alves de Freitas , José Nuno Canongia Lopes , Ingmar Nopens , Karel Lesage

When trying to reduce the paste content in concrete mixtures for economic reasons, the impact of poor rheology control becomes more prominent. One underlying cause is the incomplete knowledge about force interactions between cement particles originating at the molecular scale. The molecular dynamics simulations presented in this work are conducted with the objective of obtaining a high-resolution picture of the in-plane structure and dynamics of electrolytic solutions confined between two cement clinker surfaces. It was found how the crystalline composition of the solids (i.e., Alite, Belite, Aluminate) impacts the molecular arrangement of the liquid phase and how this in turn affects the magnitude and sign of the forces between the studied surfaces. The differences in peak intensities and locations were explained by the surface-dependent equilibrium between ion correlation, electrostatic repulsive, and at small separations, solvation forces.



中文翻译:

水溶液中熟料矿物有效相互作用的分子动力学模拟与间隙水的结构和动力学

当出于经济原因试图减少混凝土混合物中的糊料含量时,流变控制不良的影响变得更加突出。一个潜在的原因是对源自分子尺度的水泥颗粒之间的力相互作用的了解不完整。进行这项工作中提出的分子动力学模拟的目的是获得限制在两个水泥熟料表面之间的电解溶液的面内结构和动力学的高分辨率图片。已发现固体(即,阿利特、贝利特、铝酸盐)的结晶组成如何影响液相的分子排列,以及这又如何影响所研究表面之间力的大小和符号。

更新日期:2021-06-07
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